Guidance on interpretation of the COVID-19 vaccine impact on infections in the Sciensano weekly report, Van Loenhout, Joris, Hubin Pierre, Braeye Toon, Brondeel Ruben, Van Evercooren Izaak, Santy Luca, de Muylder Géraldine, and Catteau Lucy , May 2022, p.6, (2022)